/*
 *	ME2 C++ SDK
 *	Copyright (c) 2010 _silencer
 *
 *	Permission is hereby granted, free of charge, to any person
 *	obtaining a copy of this software and associated documentation
 *	files (the "Software"), to deal in the Software without
 *	restriction, including without limitation the rights to use,
 *	copy, modify, merge, publish, distribute, sublicense, and/or sell
 *	copies of the Software, and to permit persons to whom the
 *	Software is furnished to do so, subject to the following
 *	conditions:
 *
 *	The above copyright notice and this permission notice shall be
 *	included in all copies or substantial portions of the Software.
 *
 *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *	OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *	NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *	HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *	WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *	OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef UNREAL_SINGLETON_H
#define UNREAL_SINGLETON_H

namespace unreal
{
	template <typename _T>
	class usingleton
	{
	public:

		static _T* get_singleton_ptr()
		{
			static _T* instance = 0;
			static boost::mutex mutex;

			if ( instance == 0 )
			{
				boost::mutex::scoped_lock lock( mutex );

				if ( instance == 0 )
					instance = new _T;
			}

			return instance;
		}

		static inline _T& get_singleton()
		{
			return *get_singleton_ptr();
		}

		virtual ~usingleton(){}

	protected:

		usingleton(){}
	};
}

#endif
